
12
DAILY CHECKING
The following can cause problems with welding: Fittings, welding materials, environmental factors, power
supply and welding techniques. User must try to improve working conditions.
Position Checking keys Remarks
Control panel 1. Condition of switches and potentiometers.
2. Warning lights Replace if faulty.
Cooling fan 1. Check if there is air ow.
2. Abnormal vibration or noise.
Check for obstructions at fan intake or broken
blades.
Powered ON 1. Any burnt smell.
2. LED working. Check fault nding.
Periphery
1. Check gas pipe not leaking or kinked.
2. Check housing and other xed parts are
tight and or damaged
Correct any faults.
Pressing arm 1. Check that it is not over tightened and is not
melted / distorted Leeds to wire slipping.
Wire inlet &
outlet
guide Tube
1. Check that there is no buildup of steel dust
in the tube (residue)
2. Wire diameter and the tube inner diameter
match
3 .Check that the tube lines up with the center
of the drive roll slot
Clean the residue check the cause and solve it.
If mismatch, lead to unstable arc and residue build
up.
If unaligned, leads to unstable arc and residue build
up.
Drive Roll 1. Drive roll matches the wire size.
2. Check that slot is not blocked up
1. Leeds to unstable arc and the wire slipping or
deforming.
2. Replace if worn out.
Pressure wheel 1. Check the stability of its movement, and
wearing-out of pressure wheel(bearing) Lead to unstable arc and wire slipping.
Nozzle/ Shroud 1. If distorted or damaged
2. Splatter built up.
Replace. Can cause porosity. (use anti splatter
spray)
Contact Tip 1. Hole in tip oval worn out.
2. Hole blocked or wire welded on to tip
Replace - unstable and broken arc Replace - reason
worn tip, voltage to high, rusted or dirty wire.
Wire Liner
1. Check the liner is the correct length.
2. Check wire diameter and the liner inner
diameter are correct
3. Partial unwinding and stretching
4. Blocked caused by rust and dust in the tube,
and llings of the wire copper coating.
5. Liner broken or bent.
Must touch tip - Replace if too short will cause the
arc to be unstable. Reason of unstable arc, use the
correct liner.
Result in poor wire feeding and unstable arc,
Replace
Tip Adaptor 1. Threads damaged or distorted
2. Holes blocked
Replace can damage contact tip or swan neck and
cause unstable and broken arc, porosity in weld
Torch cable
1. Check that torch cable isn't coiled or kinked
2. Check the Euro adaptor connector on the
torch is tight
Cause poor wire feeding
Unstable arc if cable coiled or kinked.
Output cable
1. Wearing-out of the cable insulated material.
2. Cable jack plug connector exposed or loose
3. Earth clamp not damaged or burnt, lug
tightened
Loose or bad connections get very hot causing a
drop in welding amperage
240v Input cable
1. Check the cable between the plug and the
machine
2. Plug is in good condition
Replace damaged plugs with correct amperage plug
WELDING MACHINEWIRE FEEDING ASSEMBALYMIG TORCHCABLE